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Copythat:
Group Title
Find the height of each pyramid:
 updated one year ago
 6 replies
 No Medals Yet
Mathematics

Copythat:
Group Title
Let P be the circumcenter and G be the centroid of a triangle formed by placing two perpendicular vectors v and w tail to tail. Express GP i…
 updated 2 years ago
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Mathematics

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A triangle, whose sides are 6, 8, and 10, and a circle, whose radius is r, are drawn so that no part of the triangle lies outside the circle…
 updated 2 years ago
 18 replies
 1 Medal
Mathematics

Copythat:
Group Title
Think of the ground you are standing on as the xyplane. The vector [12,5,10] points from you toward the Sun. How high is the Sun in the sky…
 updated 2 years ago
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Mathematics

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What is the radius of the largest circle that will fit inside an equilateral triangle with 12inch sides?
 updated 2 years ago
 3 replies
 1 Medal
Mathematics

Copythat:
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What is the radius of the smallest circle that encloses an equilateral triangle with 12inch sides?
 updated 2 years ago
 7 replies
 1 Medal
Mathematics

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Group Title
A line drawn parallel to the side BC of triangle ABC intersects side AB at P and side AC at Q. The measurements AP = 3.8 in, PB = 7.6 in, an…
 updated 2 years ago
 2 replies
 1 Medal
Mathematics

Copythat:
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Given a line λ (Greek "lambda") and a point F not on λ, let P be on the parabola of all points that are equidistant from F and from λ. Let N…
 updated 2 years ago
 14 replies
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Mathematics

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Let G be the centroid of triangle ABC. Simply the vector sum GA+GB+GC.
 updated 2 years ago
 6 replies
 1 Medal
Mathematics

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Given DCBP is a parallelogram; FE = BC, Prove AD = BC. (Diagram Provided)
 updated 2 years ago
 1 reply
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Mathematics

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Triangle PQR is isosceles, with PQ = 13 = PR and QR = 10. Find the distance from Q to the centroid of PQR
 updated 2 years ago
 1 reply
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Mathematics

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Quick Geometry Question:
1. A trapezoid has a 60degree angle and a 45degree angle. What are the other angles?
…
 updated 2 years ago
 4 replies
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Mathematics

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In the figure below. ABCD is a parallelogram. YA, WB, WC, and YD bisect angles <BAD, <ABC, <BCD, and <CDA, respectively. Find the measure of…
 updated 2 years ago
 2 replies
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Mathematics

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Determine the value of x in the diagram below.
 updated 2 years ago
 7 replies
 1 Medal
Mathematics

Copythat:
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In this diagram, a rectangular sheet of paper ABCD has been creased so that corner A is now placed on edge CD, at A'. Find the size of angle…
 updated 2 years ago
 5 replies
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Mathematics

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You are given a square ABCD, and midpoint M and N are marked on BC and CD, respectively. Draw AM and BN, which meet at Q. Find the size of a…
 updated 2 years ago
 1 reply
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Mathematics

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Mark Y inside regular pentagon PQRST, so that PQY is equilateral. Is RYT straight? Explain.
 updated 2 years ago
 6 replies
 2 Medals
Mathematics

Copythat:
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In triangle PQR, it is given that angle R measures r degrees. The bisectors of angles P and Q are drawn, creating two acute angles where the…
 updated 2 years ago
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Mathematics

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Let A = (0,0), B = (8,0), and C =(x,x). Find x, given that BC = 10 and CAB is a 45degree angle
 updated 2 years ago
 4 replies
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Mathematics

Copythat:
Group Title
Let A = (0,0), B = (8,0), and C =(x,x). Find x, given that BC = 7
 updated 2 years ago
 4 replies
 1 Medal
Mathematics

Copythat:
Group Title
Experiment with Gallium:
The goal of my experiment is to prove that the heat capacity of gallium is 0.37 J/gC by choosing masses and initi…
 updated 2 years ago
 6 replies
 1 Medal
Mathematics

Copythat:
Group Title
Vector Problem:
In triangle ABC, let vector u = AB and vector v = BC. Let M be the midpoint of AB and N be the midpoint of BC. Write each o…
 updated 2 years ago
 5 replies
 2 Medals
Mathematics

Copythat:
Group Title
If 543.4 kJ were transferred to 2.5 kg of water at its boiling point, what fraction of the water would be vaporized?
 updated 2 years ago
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Mathematics

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How do you produce a tessellation?
Let A = (1,1), B = (3,5) and C =(7,2). Explain how to cover the whole plane with nonoverlapping trian…
 updated 2 years ago
 3 replies
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Mathematics

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A serving of CheezIts releases 130 kcal (1 kcal = 4.18 kJ) when digested by your body. If this same amount of energy were transferred to 2.…
 updated 2 years ago
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Mathematics

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Tate walks along the boundary of a foursided plot of land, writing down the number of degrees turned at each corner. What is the sum of the…
 updated 2 years ago
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Mathematics

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In the figure at right, it is given than BDC is straight, BD = DA, and AB = AC = DC. Find the size of angle C
 updated 2 years ago
 11 replies
 2 Medals
Mathematics

Copythat:
Group Title
Alex the geologist is in the desert again, 10km from a long, straight road and 45 km from base camp. The base camp is also 10km from the roa…
 updated 2 years ago
 1 reply
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Mathematics

Copythat:
Group Title
Draw a parallelogram whose adjacent sides are determined by the vectors [4,6] and [3,5]. Find the area of the parallelogram.
 updated 2 years ago
 16 replies
 2 Medals
Mathematics

Copythat:
Group Title
Let A=(8,6), B=(0,10), and C=(6,8). Find the lengths of the altitudes.
 updated 2 years ago
 2 replies
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Mathematics
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